wordrec: Replace NULL by nullptr

Signed-off-by: Stefan Weil <sw@weilnetz.de>

wordrec/associate.cpp

@@ -44,7 +44,7 @@ void AssociateUtils::ComputeStats(int col, int row,
                                   AssociateStats *stats) {
   stats->Clear();
 
-  ASSERT_HOST(word_res != NULL);
+  ASSERT_HOST(word_res != nullptr);
   if (word_res->blob_widths.empty()) {
     return;
   }
@@ -55,7 +55,7 @@ void AssociateUtils::ComputeStats(int col, int row,
   float normalizing_height = kBlnXHeight;
   ROW* blob_row = word_res->blob_row;
   // TODO(rays/daria) Can unicharset.script_has_xheight be useful here?
-  if (fixed_pitch && blob_row != NULL) {
+  if (fixed_pitch && blob_row != nullptr) {
     // For fixed pitch language like CJK, we use the full text height
     // as the normalizing factor so we are not dependent on xheight
     // calculation.
@@ -126,7 +126,7 @@ void AssociateUtils::ComputeStats(int col, int row,
     // the means and variances are computed for the path so far (not
     // considering characters to the right of the last character on the path).
     stats->full_wh_ratio = wh_ratio + right_gap;
-    if (parent_stats != NULL) {
+    if (parent_stats != nullptr) {
       stats->full_wh_ratio_total =
         (parent_stats->full_wh_ratio_total + stats->full_wh_ratio);
       float mean =

wordrec/associate.h

@@ -97,7 +97,7 @@ class AssociateUtils {
   // information in the (col, row) entry of the ratings matrix is not used).
   //
   // Note: the function assumes that word_res, stats and
-  // associate_cost pointers are not NULL.
+  // associate_cost pointers are not nullptr.
   static void ComputeStats(int col, int row,
                            const AssociateStats *parent_stats,
                            int parent_path_length,

wordrec/chop.cpp

@@ -124,7 +124,7 @@ int Wordrec::angle_change(EDGEPT *point1, EDGEPT *point2, EDGEPT *point3) {
 EDGEPT *Wordrec::pick_close_point(EDGEPT *critical_point,
                                   EDGEPT *vertical_point,
                                   int *best_dist) {
-  EDGEPT *best_point = NULL;
+  EDGEPT *best_point = nullptr;
   int this_distance;
   int found_better;
 
@@ -161,46 +161,46 @@ EDGEPT *Wordrec::pick_close_point(EDGEPT *critical_point,
  */
 void Wordrec::prioritize_points(TESSLINE *outline, PointHeap* points) {
   EDGEPT *this_point;
-  EDGEPT *local_min = NULL;
-  EDGEPT *local_max = NULL;
+  EDGEPT *local_min = nullptr;
+  EDGEPT *local_max = nullptr;
 
   this_point = outline->loop;
   local_min = this_point;
   local_max = this_point;
   do {
     if (this_point->vec.y < 0) {
                                  /* Look for minima */
-      if (local_max != NULL)
+      if (local_max != nullptr)
         new_max_point(local_max, points);
       else if (is_inside_angle (this_point))
         add_point_to_list(points, this_point);
-      local_max = NULL;
+      local_max = nullptr;
       local_min = this_point->next;
     }
     else if (this_point->vec.y > 0) {
                                  /* Look for maxima */
-      if (local_min != NULL)
+      if (local_min != nullptr)
         new_min_point(local_min, points);
       else if (is_inside_angle (this_point))
         add_point_to_list(points, this_point);
-      local_min = NULL;
+      local_min = nullptr;
       local_max = this_point->next;
     }
     else {
       /* Flat area */
-      if (local_max != NULL) {
+      if (local_max != nullptr) {
         if (local_max->prev->vec.y != 0) {
           new_max_point(local_max, points);
         }
         local_max = this_point->next;
-        local_min = NULL;
+        local_min = nullptr;
       }
       else {
         if (local_min->prev->vec.y != 0) {
           new_min_point(local_min, points);
         }
         local_min = this_point->next;
-        local_max = NULL;
+        local_max = nullptr;
       }
     }
 
@@ -216,7 +216,7 @@ void Wordrec::prioritize_points(TESSLINE *outline, PointHeap* points) {
  *
  * Found a new minimum point try to decide whether to save it or not.
  * Return the new value for the local minimum.  If a point is saved then
- * the local minimum is reset to NULL.
+ * the local minimum is reset to nullptr.
  */
 void Wordrec::new_min_point(EDGEPT *local_min, PointHeap* points) {
   int16_t dir;
@@ -240,7 +240,7 @@ void Wordrec::new_min_point(EDGEPT *local_min, PointHeap* points) {
  *
  * Found a new minimum point try to decide whether to save it or not.
  * Return the new value for the local minimum.  If a point is saved then
- * the local minimum is reset to NULL.
+ * the local minimum is reset to nullptr.
  */
 void Wordrec::new_max_point(EDGEPT *local_max, PointHeap* points) {
   int16_t dir;
@@ -280,7 +280,7 @@ void Wordrec::vertical_projection_point(EDGEPT *split_point, EDGEPT *target_poin
   int x = split_point->pos.x;    /* X value of vertical */
   int best_dist = LARGE_DISTANCE;/* Best point found */
 
-  if (*best_point != NULL)
+  if (*best_point != nullptr)
     best_dist = edgept_dist(split_point, *best_point);
 
   p = target_point;
@@ -291,13 +291,13 @@ void Wordrec::vertical_projection_point(EDGEPT *split_point, EDGEPT *target_poin
         !same_point(split_point->pos, p->pos) &&
         !same_point(split_point->pos, p->next->pos) &&
         !p->IsChopPt() &&
-        (*best_point == NULL || !same_point((*best_point)->pos, p->pos))) {
+        (*best_point == nullptr || !same_point((*best_point)->pos, p->pos))) {
 
       if (near_point(split_point, p, p->next, &this_edgept)) {
         new_point_it.add_before_then_move(this_edgept);
       }
 
-      if (*best_point == NULL)
+      if (*best_point == nullptr)
         best_dist = edgept_dist (split_point, this_edgept);
 
       this_edgept =